Patent GB-145509-A (GB)
Abstract: 145,509. Optische Anstalt C. P. Goerz Akt.-Ges. Aug. 19, 1918. [Convention date]. Transfer mechanism.-In calculating-apparatus of the externallyoperated type, adapted for both addition and subtraction, in which the totalizing-counter and the actuating sectors are moved relatively for engagement and disengagement, at the transfer point a lever is set and. on the upward movement, pairs of racks are reciprocated to effect the transfer. These racks also serve to prevent overthrow on actuation, being brought into engagement with the toothed intermediate gearing as it is raised out of engagement with the actuating sectors. Each registering drum is provided with two sets of gearing, intermediate between it and the corresponding actuatmg gear, adapted to drive the drum in opposite directions according as addition or subtraction is being performed. One member only of the double racks is in engagement at a time, and when the actuating sectors are in engagement with the adding wheels, transfer is effected through the subtracting wheels and vice-versa. Pivoted at 5 in the totalizer casing are levers 6 provided with V-shaped projections 7 which, when struck by pins 4 on the counting wheels, are rocked into the position shown in Fig 3, wherein they are held by the engagement with projections 14 on the levers of shoulders 15 on pivoted catches 11 connected by springs 12 to the levers. Lowering of the counter frame places the ends 19 of the levers 6 below pins 20 carried by spring-retracted arms 21 formed with two notches, in the uppermost of which spring-controlled bell-crank levers 24 carrying pairs of racks 16, 16<1> are supported. On the return movement of the counter frame, after the racks 16, 16<1> Eave been placed in engagement with the driving-wheels of the counter, the arms 21 are rocked by the projections 19 of the levers 6 to allow the bell-cranks 24 to fall under the influence of their springs to the second steps 26, and thus force forward the racks 16<1> to complete the transfer for an adding operation through the subtraction wheels 2<1>. Return of the racks 16, 16<1> is effected by a bail 29, which strikes the turned-up ends 30 of the levers 24, and is carried by spring-controlled levers 31, Fig. 5, rocked from a crank-operated slide 34 through toggle levers 42, 44. The levers 44 are connected to the levers 31 at 45 and the links 42 to levers 36, operated by the slide 34, by pin-andslot connexions 40, 41, being supported in this position by rollers 46 carried by levers 16<a> supporting the guide 18 for the racks 16, 16<1>. A bail 37 by which the actuating-sectors 3 are rocked against the action of springs 3<a> is carried by the levers 36. The counter is movable laterally for adding and subtracting operations, the sectors 3 being situated between the racks 16, 16<1> and brought into engagement with the wheels 2, 2<1> respectively. During addition, the racks 16<1> are in engagement with the subtraction wheels 2<1> and the racks 16 with the addition wheels 2 during subtraction. Overthrow during actuation is prevented by the racks 16, 16<1> coming into engagement with the wheels 2, 2<1> as they leave the actuating-sectors 3.